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The heat shock response of pollen and other tissues of maize

Plant Molecular Biology volume 19, pages 623–630 (1992)Cite this article

Abstract

While a heat shock treatment of 40 °C or 45 °C induced the vegetative tissues of maize to produce the typical heat shock proteins (HSPs), germinating maize pollen exposed to the same temperatures did not synthesize these characteristic HSPs. Comparison of RNA accumulation in shoot and tassel tissue showed that mRNAs for HSP70 and HSP18 increased several-fold, reaching high levels within 1 or 2 hours. At the higher temperature of 45 °C these vegetative tissues were blocked in removal of an intron from the HSP70 mRNA precursor, which accumulated to a high level in tassel tissue. In germinating pollen exposed to heat shock, mRNAs for these HSPs were induced but accumulated only to low levels. The stressed pollen maintained high levels of RNA for α-tubulin, a representative normal transcript. It is likely that the defective heat shock response of maize pollen is due to inefficient induction of heat shock gene transcription.

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Author information

Affiliations

  1. Department of Plant Biology, The University of Minnesota, 55108, Saint Paul, MN, USA

    Norbert Hopf, Nora Plesofsky-Vig & Robert Brambl

  2. Department of Genetics and Cell Biology, The University of Minnesota, 55108, Saint Paul, MN, USA

    Nora Plesofsky-Vig

  3. Plant Molecular Genetics Institute, The University of Minnesota, 55108, Saint Paul, MN, USA

    Robert Brambl

Authors
  1. Norbert Hopf
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  2. Nora Plesofsky-Vig
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  3. Robert Brambl
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Hopf, N., Plesofsky-Vig, N. & Brambl, R. The heat shock response of pollen and other tissues of maize. Plant Mol Biol 19, 623–630 (1992). https://doi.org/10.1007/BF00026788

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  • DOI: https://doi.org/10.1007/BF00026788

Key words

  • gene expression
  • heat shock
  • intron
  • maize
  • pollen
  • RNA